Thoesten noedenfelt



(No Model.)

T. NORDENFELT. ORDNANGE CARRIAGE.

N10; 338,766. Patented Mer. 30, 1886.

n. PEILRS. Plmmumngnnpmn wnshmgmn. n4 c.

limitan *raras Farrar Ormea.,

'IHORSTEN NORDENFELT, OF VESTMINSTER, ENGLAND.

ORDNANCE-CARRAGE.

SPECIFICATION forming part of Letters Patent No. 338,766, dated March30, 1886.

Application filed August 11, 1885. Serial No. 174,129. (No model.)Patented in England March 6,1892, No. 1,072, and in France June 15,1882, No. 149.619.

To a/ZZ whom t may concern:

Be it known that I, THoRsrEN NORDEN- y FELT, a subject of the King ofSweden, re-

siding at 53 Parliament Street, inthe city of Vestminster, (late of St.Swithins Lane, in the city of Londom) England, have invented certain newand useful Improvements in Oarriages for Naval and Field Ordnance, (forwhich I have received Letters Patent in Great Britain, No. 1,072, datedMarch 6, 1882, and in France, No. 149,619, dated Junel, 1882,) of whichthe following is a specification.

The object of this improvement is to check the recoil from guns, and tocarry them quickly back again to firing position with moderated rebound.To obtain this, I combine a spring With a hydraulic buffer. I put thespring or springs inside the hydraulic cylinder in such a Way that theyare acted upon direct by the hydraulic piston. The liquid in thecylinder is on both sides of the piston, and is during the action of therecoil forcedv from one side of the piston to the other throughspeciallymade passages. These passages consist of grooves along theinner surface of the cylinder, and their combined sectional area mayeither be constant over the whole stroke or varying for the purpose ofbetter regulating the uctuation of pressure during the movement of thepiston. As described, the variation of the area of the grooves isobtained by making them more or less deep or Wide, or by increasing ordiminishing their number at certain parts of the length of the cylinder.The action of this arrangement may readily be understood, as follows:"When the shot is fired,

' the piston forces the liquid from one side to fect, I will proceed todescribe the drawings hereunto annexed.

In the drawings, Figure l is a side elevation, partly in section, of agun upon a pivotcarriage towhich my combined spring and hydraulic bufferis applied. Fig. 2 is a rear elevation, and Fig. 3 is a plan of thesame. Fig. 4 shows a longitudinal section, and Fig. 5 a transversesection, of the hydraulic cylinder.

The trunnions of the gun are carried upon a lever, a, of which thefulcrum is at a', so

that the lower end of the lever is drawn for.

Ward by the recoil.

The lever a is here jointed t0 the piston-rod b of a piston, c. Thepistonrcd is surrounded by the spiral springs d d, and e is a diskthrough which the rod passes freely. Y

j' is a cylinder in which the piston, the springs, and the disk arecontained. The end cover of the cylinderf is secured to the guncarriageby a bolt, g, on which the cylinder is able to rock slightly, toaccommodate itself to the position oi' the lever a. At the front end ofthe cylinder f there is a gland containing a cupped leather, f', toretain the oil or other liquid with which the cylinder is filled.

fzf2 are grooves within the cylinder to permit the oil or liquid to passthe piston. They become fewer and narrower as the fore end of the strokeof the piston is approached.

Other parts of the gun-'carriage and the gun are clearly shown in thedrawings, but they form no part of the invention secured to me by thispatent.

Having thus described the nature of th said invention and the manner ofperforming the same, I would have it understood that what I claim is- 1.The combination, with a gun-carriage, of a hydraulic cylinder and pistonfor controlling the movement of the gun in recoiling and returning tothe firing position, and the spring acting upon the piston to check therecoil and restore the gun to the iii-ing position, substantially as andfor the purpose set forth.

2. The combination, with a gun-carriage, of the grooved hydrauliccylinder and its piston for controlling the movement of the gun in aspring Within the cylinder and acting upon reeoiling and returning` tothe firing position,

carriage connected at its lower end with 'alle [o and the spring Withinsaid cylinder and actf piston and ab its upper end supporting the ingupon the piston for checking the recoil gun by its trunnions,substantially as and for and restoring the gun to the firing position,the purpose Set forth. substantially as and for the purpose seb forth. T

3. The combination, with a gun-carriage, of THORSTEB NORDENFELT ahydraulic cylindenibs piston,and piston-rod, Witnesses:

PHILIP THAINE,

the piston, and the pivoted lever of t-he gun- E. BRUSEWITZ.

